THE EFFECT OF HUMIDIFYING THE AUXILIARY AIR FLOW ON THE HEAT TRANSFER PROCESS IN THE RECUPERATIVE HEAT EXCHANGER

Abstract

The process of changing the state of moist air in the equipment of mechanical ventilation or air conditioning systems using a plate cross-flow heat exchanger for the purpose of indirect evaporative cooling of the inflow in the cooling period of the year under the conditions of evaporation of water carried away from the humidification section is considered. The features of heat transfer in the heat exchanger in the presence of evaporation are studied and the results of calculation of the increasing coefficient to the temperature efficiency of the heat exchanger for the flow of heated exhaust air depending on the number of units of heat and moisture transfer are presented. The refinement of the construction of the process of changing the state of moist air on the I-d diagram for the scheme under consideration, taking into account evaporation, is shown and the effect of increasing the efficiency of the heat exchanger on the required air exchange in the serviced room is revealed. The presentation is illustrated by numerical and graphical examples.